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Forests 2017, 8(11), 417; doi:10.3390/f8110417

Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species

1
Instituto de Silvicultura e Industria de la Madera, Universidad Juárez del Estado de Durango, Boulevard del Guadiana 501, Ciudad Universitaria, Torre de Investigación, 34120 Durango, Mexico
2
Facultad de Ciencias Forestales, Universidad Juárez del Estado de Durango, Río Papaloapan y Blvd. Durango s/n. Col. Valle del Sur, 34120 Durango, Mexico
3
Departamento de Producción Vegetal, Universidad de Santiago de Compostela, Escuela Politécnica Superior, C/ Benigno Ledo, Campus Universitario, 27002 Lugo, Spain
4
Instituto Tecnológico de El Salto, Mesa del Tecnológico s/n., 39942 El Salto, Mexico
5
Departamento de Ingeniería Agroforestal, Universidad de Santiago de Compostela, Politécnica Superior, C/ Benigno Ledo, Campus Universitario, 27002 Lugo, Spain
*
Author to whom correspondence should be addressed.
Received: 22 September 2017 / Revised: 26 October 2017 / Accepted: 26 October 2017 / Published: 1 November 2017
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Abstract

Accurate quantification of branch volume in trees is important for sustainable forest management, especially as these fractions are increasingly used for bioenergy, and for precise forest CO2 quantification. Whereas a large focus has been placed on the compatible estimation of tree taper and bole volume with and without bark, little effort has been made to develop models that allow a simultaneous prediction of these variables together with tree branch volume. In this study, 595 Pinus cooperi trees and 700 Pinus durangensis trees were sampled in pine-oak forests in the Sierra Madre Occidental, Mexico. A compatible system for predicting two segmented taper functions, over and under bark; the corresponding merchantable volumes; coarse branch volume and whole-tree volume was fitted using a modified continuous autoregressive structure to account for autocorrelation. The proposed compatible equations explained more than 97% of the observed variability in diameter over and under bark, volume over and under bark, and total tree volume and more than 64% of the observed variability in branch volume in both species. The method described can theoretically be replicated for any tree species, thus providing a better understanding of the patterns of volume distribution by components, potentially improving carbon accounting system and forest bioenergy planning. View Full-Text
Keywords: taper function; branch volume; bark volume; simultaneous fitting taper function; branch volume; bark volume; simultaneous fitting
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MDPI and ACS Style

Corral-Rivas, J.J.; Vega-Nieva, D.J.; Rodríguez-Soalleiro, R.; López-Sánchez, C.A.; Wehenkel, C.; Vargas-Larreta, B.; Álvarez-González, J.G.; Ruiz-González, A.D. Compatible System for Predicting Total and Merchantable Stem Volume over and under Bark, Branch Volume and Whole-Tree Volume of Pine Species. Forests 2017, 8, 417.

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